Anisotropy Constants andgValue of Nickel Ferrite

This paper presents experimental data on the anisotropy constants and $g$ value of nickel ferrite from 4°K to 300°K over a frequency range of 7900 to 11 500 Mc/sec. The observed anisotropy constants agree with those measured by Yager, Galt, and Merritt at $K$ band on the same crystal. Previous measurements by Healy at $X$ band are considerably different, presumably as a result of variations between different single-crystal samples representing the same ferrite. The measured $g$ values show a significant variation with frequency. This has not been observed in previous measurements on single crystals.